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A local sensor for joint temperature and velocity measurements in turbulent flows

We present the principle for a micro-sensor aimed at measuring local correlations of turbulent velocity and temperature. The operating principle is versatile and can be adapted for various types of flow. It is based on a micro-machined cantilever, on the tip of which a platinum resistor is patterned...

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Autores principales: Salort, Julien, Rusaouën, Éléonore, Robert, Laurent, du Puits, Ronald, Loesch, Alice, Pirotte, Olivier, Roche, Philippe-E, Castaing, Bernard, Chilla, Francesca
Lenguaje:english
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1063/1.4989430
http://cds.cern.ch/record/2694251
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author Salort, Julien
Rusaouën, Éléonore
Robert, Laurent
du Puits, Ronald
Loesch, Alice
Pirotte, Olivier
Roche, Philippe-E
Castaing, Bernard
Chilla, Francesca
author_facet Salort, Julien
Rusaouën, Éléonore
Robert, Laurent
du Puits, Ronald
Loesch, Alice
Pirotte, Olivier
Roche, Philippe-E
Castaing, Bernard
Chilla, Francesca
author_sort Salort, Julien
collection CERN
description We present the principle for a micro-sensor aimed at measuring local correlations of turbulent velocity and temperature. The operating principle is versatile and can be adapted for various types of flow. It is based on a micro-machined cantilever, on the tip of which a platinum resistor is patterned. The deflection of the cantilever yields an estimate for the local velocity, and the impedance of the platinum yields an estimate for the local temperature. The velocity measurement is tested in two turbulent jets: one with air at room temperature which allows us to compare with well-known calibrated reference anemometers, and another one in the GReC jet at CERN with cryogenic gaseous helium which allows a much larger range of resolved turbulent scales. The recording of temperature fluctuations is tested in the Barrel of Ilmenau which provides a controlled turbulent thermal flow in air. Measurements in the wake of a heated or cooled cylinder demonstrate the capability of the sensor to display the cross correlation between temperature and velocity correctly.
id oai-inspirehep.net-1756862
institution Organización Europea para la Investigación Nuclear
language english
publishDate 2018
record_format invenio
spelling oai-inspirehep.net-17568622021-03-01T10:44:03Zdoi:10.1063/1.4989430http://cds.cern.ch/record/2694251englishSalort, JulienRusaouën, ÉléonoreRobert, Laurentdu Puits, RonaldLoesch, AlicePirotte, OlivierRoche, Philippe-ECastaing, BernardChilla, FrancescaA local sensor for joint temperature and velocity measurements in turbulent flowsDetectors and Experimental TechniquesWe present the principle for a micro-sensor aimed at measuring local correlations of turbulent velocity and temperature. The operating principle is versatile and can be adapted for various types of flow. It is based on a micro-machined cantilever, on the tip of which a platinum resistor is patterned. The deflection of the cantilever yields an estimate for the local velocity, and the impedance of the platinum yields an estimate for the local temperature. The velocity measurement is tested in two turbulent jets: one with air at room temperature which allows us to compare with well-known calibrated reference anemometers, and another one in the GReC jet at CERN with cryogenic gaseous helium which allows a much larger range of resolved turbulent scales. The recording of temperature fluctuations is tested in the Barrel of Ilmenau which provides a controlled turbulent thermal flow in air. Measurements in the wake of a heated or cooled cylinder demonstrate the capability of the sensor to display the cross correlation between temperature and velocity correctly.oai:inspirehep.net:17568622018
spellingShingle Detectors and Experimental Techniques
Salort, Julien
Rusaouën, Éléonore
Robert, Laurent
du Puits, Ronald
Loesch, Alice
Pirotte, Olivier
Roche, Philippe-E
Castaing, Bernard
Chilla, Francesca
A local sensor for joint temperature and velocity measurements in turbulent flows
title A local sensor for joint temperature and velocity measurements in turbulent flows
title_full A local sensor for joint temperature and velocity measurements in turbulent flows
title_fullStr A local sensor for joint temperature and velocity measurements in turbulent flows
title_full_unstemmed A local sensor for joint temperature and velocity measurements in turbulent flows
title_short A local sensor for joint temperature and velocity measurements in turbulent flows
title_sort local sensor for joint temperature and velocity measurements in turbulent flows
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1063/1.4989430
http://cds.cern.ch/record/2694251
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